The rtkinenc package is functionally similar to the standard LaTeX
package inputenc: both set up active
characters so that an input character outside the range of 7-bit
visible ASCII is coverted into one or more corresponding LaTeX
commands. The main difference lies in that rtkinenc allows the
user to specify a fallback procedure to use when the text command
corresponding to some input character isn't available.

Names of commands in rtkinenc have been selected so that it can
read inputenc encoding definition files, and the aim is that
rtkinenc should be backwards compatible with inputenc. rtkinenc is
not a new version of inputenc though, nor is it part of standard
LaTeX.

For an example of how rtkinenc is used, the user may look at the
tclldoc class.